From 222e2a7620e6520ffaf4fc4e69d79c18da31542e Mon Sep 17 00:00:00 2001 From: "Zancanaro; Carlo" Date: Mon, 24 Sep 2012 09:58:17 +1000 Subject: Add the clang library to the repo (with some of my changes, too). --- clang/lib/Driver/ToolChain.cpp | 288 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 288 insertions(+) create mode 100644 clang/lib/Driver/ToolChain.cpp (limited to 'clang/lib/Driver/ToolChain.cpp') diff --git a/clang/lib/Driver/ToolChain.cpp b/clang/lib/Driver/ToolChain.cpp new file mode 100644 index 0000000..db4d2a8 --- /dev/null +++ b/clang/lib/Driver/ToolChain.cpp @@ -0,0 +1,288 @@ +//===--- ToolChain.cpp - Collections of tools for one platform ------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "clang/Driver/ToolChain.h" + +#include "clang/Driver/Action.h" +#include "clang/Driver/Arg.h" +#include "clang/Driver/ArgList.h" +#include "clang/Driver/Driver.h" +#include "clang/Driver/DriverDiagnostic.h" +#include "clang/Driver/ObjCRuntime.h" +#include "clang/Driver/Options.h" +#include "llvm/ADT/StringSwitch.h" +#include "llvm/Support/ErrorHandling.h" +using namespace clang::driver; +using namespace clang; + +ToolChain::ToolChain(const Driver &D, const llvm::Triple &T) + : D(D), Triple(T) { +} + +ToolChain::~ToolChain() { +} + +const Driver &ToolChain::getDriver() const { + return D; +} + +std::string ToolChain::GetFilePath(const char *Name) const { + return D.GetFilePath(Name, *this); + +} + +std::string ToolChain::GetProgramPath(const char *Name, bool WantFile) const { + return D.GetProgramPath(Name, *this, WantFile); +} + +types::ID ToolChain::LookupTypeForExtension(const char *Ext) const { + return types::lookupTypeForExtension(Ext); +} + +bool ToolChain::HasNativeLLVMSupport() const { + return false; +} + +void ToolChain::configureObjCRuntime(ObjCRuntime &runtime) const { + switch (runtime.getKind()) { + case ObjCRuntime::NeXT: + // Assume a minimal NeXT runtime. + runtime.HasARC = false; + runtime.HasWeak = false; + runtime.HasSubscripting = false; + runtime.HasTerminate = false; + return; + + case ObjCRuntime::GNU: + // Assume a maximal GNU runtime. + runtime.HasARC = true; + runtime.HasWeak = true; + runtime.HasSubscripting = false; // to be added + runtime.HasTerminate = false; // to be added + return; + } + llvm_unreachable("invalid runtime kind!"); +} + +/// getARMTargetCPU - Get the (LLVM) name of the ARM cpu we are targeting. +// +// FIXME: tblgen this. +static const char *getARMTargetCPU(const ArgList &Args, + const llvm::Triple &Triple) { + // For Darwin targets, the -arch option (which is translated to a + // corresponding -march option) should determine the architecture + // (and the Mach-O slice) regardless of any -mcpu options. + if (!Triple.isOSDarwin()) { + // FIXME: Warn on inconsistent use of -mcpu and -march. + // If we have -mcpu=, use that. + if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) + return A->getValue(Args); + } + + StringRef MArch; + if (Arg *A = Args.getLastArg(options::OPT_march_EQ)) { + // Otherwise, if we have -march= choose the base CPU for that arch. + MArch = A->getValue(Args); + } else { + // Otherwise, use the Arch from the triple. + MArch = Triple.getArchName(); + } + + return llvm::StringSwitch(MArch) + .Cases("armv2", "armv2a","arm2") + .Case("armv3", "arm6") + .Case("armv3m", "arm7m") + .Cases("armv4", "armv4t", "arm7tdmi") + .Cases("armv5", "armv5t", "arm10tdmi") + .Cases("armv5e", "armv5te", "arm1026ejs") + .Case("armv5tej", "arm926ej-s") + .Cases("armv6", "armv6k", "arm1136jf-s") + .Case("armv6j", "arm1136j-s") + .Cases("armv6z", "armv6zk", "arm1176jzf-s") + .Case("armv6t2", "arm1156t2-s") + .Cases("armv7", "armv7a", "armv7-a", "cortex-a8") + .Cases("armv7r", "armv7-r", "cortex-r4") + .Cases("armv7m", "armv7-m", "cortex-m3") + .Case("ep9312", "ep9312") + .Case("iwmmxt", "iwmmxt") + .Case("xscale", "xscale") + .Cases("armv6m", "armv6-m", "cortex-m0") + // If all else failed, return the most base CPU LLVM supports. + .Default("arm7tdmi"); +} + +/// getLLVMArchSuffixForARM - Get the LLVM arch name to use for a particular +/// CPU. +// +// FIXME: This is redundant with -mcpu, why does LLVM use this. +// FIXME: tblgen this, or kill it! +static const char *getLLVMArchSuffixForARM(StringRef CPU) { + return llvm::StringSwitch(CPU) + .Cases("arm7tdmi", "arm7tdmi-s", "arm710t", "v4t") + .Cases("arm720t", "arm9", "arm9tdmi", "v4t") + .Cases("arm920", "arm920t", "arm922t", "v4t") + .Cases("arm940t", "ep9312","v4t") + .Cases("arm10tdmi", "arm1020t", "v5") + .Cases("arm9e", "arm926ej-s", "arm946e-s", "v5e") + .Cases("arm966e-s", "arm968e-s", "arm10e", "v5e") + .Cases("arm1020e", "arm1022e", "xscale", "iwmmxt", "v5e") + .Cases("arm1136j-s", "arm1136jf-s", "arm1176jz-s", "v6") + .Cases("arm1176jzf-s", "mpcorenovfp", "mpcore", "v6") + .Cases("arm1156t2-s", "arm1156t2f-s", "v6t2") + .Cases("cortex-a8", "cortex-a9", "v7") + .Case("cortex-m3", "v7m") + .Case("cortex-m4", "v7m") + .Case("cortex-m0", "v6m") + .Default(""); +} + +std::string ToolChain::ComputeLLVMTriple(const ArgList &Args, + types::ID InputType) const { + switch (getTriple().getArch()) { + default: + return getTripleString(); + + case llvm::Triple::arm: + case llvm::Triple::thumb: { + // FIXME: Factor into subclasses. + llvm::Triple Triple = getTriple(); + + // Thumb2 is the default for V7 on Darwin. + // + // FIXME: Thumb should just be another -target-feaure, not in the triple. + StringRef Suffix = + getLLVMArchSuffixForARM(getARMTargetCPU(Args, Triple)); + bool ThumbDefault = (Suffix == "v7" && getTriple().isOSDarwin()); + std::string ArchName = "arm"; + + // Assembly files should start in ARM mode. + if (InputType != types::TY_PP_Asm && + Args.hasFlag(options::OPT_mthumb, options::OPT_mno_thumb, ThumbDefault)) + ArchName = "thumb"; + Triple.setArchName(ArchName + Suffix.str()); + + return Triple.getTriple(); + } + } +} + +std::string ToolChain::ComputeEffectiveClangTriple(const ArgList &Args, + types::ID InputType) const { + // Diagnose use of Darwin OS deployment target arguments on non-Darwin. + if (Arg *A = Args.getLastArg(options::OPT_mmacosx_version_min_EQ, + options::OPT_miphoneos_version_min_EQ, + options::OPT_mios_simulator_version_min_EQ)) + getDriver().Diag(diag::err_drv_clang_unsupported) + << A->getAsString(Args); + + return ComputeLLVMTriple(Args, InputType); +} + +void ToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs, + ArgStringList &CC1Args) const { + // Each toolchain should provide the appropriate include flags. +} + +ToolChain::RuntimeLibType ToolChain::GetRuntimeLibType( + const ArgList &Args) const +{ + if (Arg *A = Args.getLastArg(options::OPT_rtlib_EQ)) { + StringRef Value = A->getValue(Args); + if (Value == "compiler-rt") + return ToolChain::RLT_CompilerRT; + if (Value == "libgcc") + return ToolChain::RLT_Libgcc; + getDriver().Diag(diag::err_drv_invalid_rtlib_name) + << A->getAsString(Args); + } + + return GetDefaultRuntimeLibType(); +} + +ToolChain::CXXStdlibType ToolChain::GetCXXStdlibType(const ArgList &Args) const{ + if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) { + StringRef Value = A->getValue(Args); + if (Value == "libc++") + return ToolChain::CST_Libcxx; + if (Value == "libstdc++") + return ToolChain::CST_Libstdcxx; + getDriver().Diag(diag::err_drv_invalid_stdlib_name) + << A->getAsString(Args); + } + + return ToolChain::CST_Libstdcxx; +} + +/// \brief Utility function to add a system include directory to CC1 arguments. +/*static*/ void ToolChain::addSystemInclude(const ArgList &DriverArgs, + ArgStringList &CC1Args, + const Twine &Path) { + CC1Args.push_back("-internal-isystem"); + CC1Args.push_back(DriverArgs.MakeArgString(Path)); +} + +/// \brief Utility function to add a system include directory with extern "C" +/// semantics to CC1 arguments. +/// +/// Note that this should be used rarely, and only for directories that +/// historically and for legacy reasons are treated as having implicit extern +/// "C" semantics. These semantics are *ignored* by and large today, but its +/// important to preserve the preprocessor changes resulting from the +/// classification. +/*static*/ void ToolChain::addExternCSystemInclude(const ArgList &DriverArgs, + ArgStringList &CC1Args, + const Twine &Path) { + CC1Args.push_back("-internal-externc-isystem"); + CC1Args.push_back(DriverArgs.MakeArgString(Path)); +} + +/// \brief Utility function to add a list of system include directories to CC1. +/*static*/ void ToolChain::addSystemIncludes(const ArgList &DriverArgs, + ArgStringList &CC1Args, + ArrayRef Paths) { + for (ArrayRef::iterator I = Paths.begin(), E = Paths.end(); + I != E; ++I) { + CC1Args.push_back("-internal-isystem"); + CC1Args.push_back(DriverArgs.MakeArgString(*I)); + } +} + +void ToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs, + ArgStringList &CC1Args) const { + // Header search paths should be handled by each of the subclasses. + // Historically, they have not been, and instead have been handled inside of + // the CC1-layer frontend. As the logic is hoisted out, this generic function + // will slowly stop being called. + // + // While it is being called, replicate a bit of a hack to propagate the + // '-stdlib=' flag down to CC1 so that it can in turn customize the C++ + // header search paths with it. Once all systems are overriding this + // function, the CC1 flag and this line can be removed. + DriverArgs.AddAllArgs(CC1Args, options::OPT_stdlib_EQ); +} + +void ToolChain::AddCXXStdlibLibArgs(const ArgList &Args, + ArgStringList &CmdArgs) const { + CXXStdlibType Type = GetCXXStdlibType(Args); + + switch (Type) { + case ToolChain::CST_Libcxx: + CmdArgs.push_back("-lc++"); + break; + + case ToolChain::CST_Libstdcxx: + CmdArgs.push_back("-lstdc++"); + break; + } +} + +void ToolChain::AddCCKextLibArgs(const ArgList &Args, + ArgStringList &CmdArgs) const { + CmdArgs.push_back("-lcc_kext"); +} -- cgit v1.2.3